You want to have:
1) low or zero tax
2) privacy
3) flexibility (not need to be locked within certain borders)
4) operational business structures with decent banking
5) asset protection
6) high quality of life
In 2024, achieving the above is not as straightforward as it once was, but still possible.
As I posted here, some countries with the highest personal income taxes (the United Kingdom 63.25% and Switzerland 59.7%) are actually regarded as tax havens, which illustrates that more complex structuring is usually the best approach, rather than relying on a single jurisdiction. This should be clear even from a purely asset︀ protection viewpoint.
From a service provider's point of view, such schemes are challenging to sell,︁ as they are complex, and people tend to like simple (to understand) solutions. Secondly, promoting︂ complex tax planning structures is, in many jurisdictions, not exactly encouraged, e.g.,
Promoters of tax︃ avoidance schemes: guidance
So, to even get relevant advice, you are often limited to certain︄ jurisdictions or "underground".